“The doors of wisdom are never shut.”
“This is the shade of difference: the door of the physician should never be shut, the door of the priest should always be open.”
“True knowledge never shuts the door on more knowledge, but zeal often does.”
“Loneliness opens the door for wisdom and wisdom opens all the doors!”
“There are more quarrels smothered by just shutting your mouth, and holding it shut, than by all the wisdom in the world.”
“Shut the front door!”